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1.
The equation 
represents a wave with
represents a wave with
2.
and 
are the velocities of sound at the same temperature in two monoatomic gases of densities 
and 
respectively. If 
then the ratio of velocities and will be
and are the velocities of sound at the same temperature in two monoatomic gases of densities and respectively. If then the ratio of velocities and will be
3.
The musical interval between two tones of frequencies 
and 
is
and is
4.
Two tuning fork, A and B produce notes of frequencies 258 Hz and 262 Hz. An unknown note sounded with a produces certain beats. When the same note is sounded with B, the beat frequency gets doubled, the unknown frequency is
5.
The amplitude of two waves are in ratio 5:2. If all other conditions for the two waves Are same, then what is the ratio of their energy densities?
6.
The intensity ratio of two waves is 1:9. The ratio of their amplitudes, is
7.
The driver of a car travelling with speed 
towards a hill sounds a horn of frequency 
If the velocity of sound in air is 
the frequency of the reflected sound as heard by the driver is
towards a hill sounds a horn of frequency If the velocity of sound in air is the frequency of the reflected sound as heard by the driver is
8.
A cylindrical tube containing air is open at both ends. If the shortest length of the tube for resonance with a given fork is 2 cm, the next shortest length for resonance with the same fork will be
9.
On which principle does sonometer works?
10.
Three sources of equal intensities with frequencies 400, 401 and 402 vib/s are sounded together. The number of beats/s is